<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top">
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                expand-trigger="hover"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableDate"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableDate"
              :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传到的后台api地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture" :headers="headerObj"
              :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
              <!-- 副文本编辑器组件 -->
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <!-- 添加商品的按钮 -->
              <el-button type="primary" class="bbb" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览"
  :visible.sync="priviewVisible"
  width="50%">
  <img :src="previewPath" alt="" class="ppp">
</el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'

export default {
  created() {
    this.getCateList();
  },
  data() {
    return {
      activeIndex: "0",
      //   添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics:[],
        // 商品的详情描述
        goods_introduce:'',
        attrs:[],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      //   商品分类列表
      catelist: [],
      //
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      //   动态参数列表数据
      manyTableDate: [],
      //   静态参数列表数据
      onlyTableDate: [],
    //   上传图片的URL地址
      uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的headers请求头对象
      headerObj:{
          Authorization:window.sessionStorage.getItem('token')
      },
      previewPath:'',
      priviewVisible:false,

    }
  },
  methods: {
    //   获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$messgae.error("获取数据失败");
      }
      this.$message.success("获取数据成功");
      this.catelist = res.data;
      console.log(this.catelist);
    },
    // 级联选择器选中项变化会触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    // 要选中三级分类才可以跳转
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是'+oldActiveName)
      // console.log('即将进入的标签页名字是'+activeName)
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    //
    async tabClicked() {
      // 证明访问的是动态参数面板
      // console.log(this.activeIndex)
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "many",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数失败");
        }
        console.log(res.data);
        //    bug
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableDate = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性失败");
        }
        console.log(res.data);
        this.onlyTableDate = res.data;
      }
    },
    // 处理图片预览效果
    handlePreview(file){
        console.log(file)
        this.previewPath=file.response.data.url
        this.priviewVisible=true
    },
    // 处理移除图片的操作
    handleRemove(file){
        // 获取要删除的图片的临时路劲
        const filePath=file.response.data.tmp_path
        // 找到图片相对应的索引值\
        const i= this.addForm.pics.findIndex(x =>x.pic===filePath)
        this.addForm.pics.splice(i,1)
        console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response){
        // console.log(response)
        // 1.拼接得到一个图片信息对象
        const picInfo={pic:response.data.tmp_path}
        // 2.将图片信息对象push到pics数组中
        this.addForm.pics.push(picInfo)
        console.log(this.addForm)
    },
    add(){
        this.$refs.addFormRef.validate(async valid=>{
            if(!valid){ return this.$message.error('请填写必要的表单项！')}
            // 执行添加的业务逻辑
            // lodash cloneDeep(obj)
            const form = _.cloneDeep(this.addForm)
          form.goods_cat=form.goods_cat.join(',')
          // 处理动态参数
          this.manyTableDate.forEach(item=>{
            const newInfo={attr_id:item.attr_id,
            attr_value:item.attr_vals.join(' ')}
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          this.onlyTableDate.forEach(item =>{
            const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}
             this.addForm.attrs.push(newInfo)
          })
          form.attrs=this.addForm.attrs
          console.log(form)

          // 发起请求添加商品
          // 商品名称必须是唯一的
          const{data:res}= await this.$http.post('goods',form)
          if(res.meta.status!==201){
            return this.$messgae.error('添加商品失败')
          }
          this.$message.success('添加商品成功！')
          this.$router.push('/goods')
        })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.ppp{
    width: 100%;
}
.bbb{margin-top: 15px;}
</style>